Chapter 107 – The Month of Nisan (first month of the Jewish year)
107.1) During the month of Nisan (first month of the Jewish year), do not say Tahanun (petition for Grace), do not hold funeral services, or say Tzidkateha tzedek (Thy righteousness) at the Minhah (prayers offered in the afternoon) service on the Sabbath.
107.2) You may not fast unless you have an evil dream.
107.3) On Shabbat Haggadol (the great Sabbath), you should read certain things. See the source for details.